--- title: "Hinsberg test Template – Chemistry Diagram | MolDraw" url: https://www.moldraw.com/templates/hinsberg-test/ description: "Hinsberg test template: Ethylamine attacks sulfur and displaces chloride; the N-ethylsulfonamide still has an N–H made acidic by the sulfonyl group, so it…" lang: en publisher: Scidart Academy generated: 2026-10-28 --- [MolDraw](https://www.moldraw.com/) › [Templates](https://www.moldraw.com/templates/) › [Name reactions](https://www.moldraw.com/templates/name-reactions/) › Hinsberg test [Name reactions](https://www.moldraw.com/templates/name-reactions/)Premium # Hinsberg test template ![Hinsberg test template: Ethylamine attacks sulfur and displaces chloride; the N-ethylsulfonamide still has an N–H made acidic by the sulfonyl group, so it dissolves in aqueous KOH as its salt.](https://www.moldraw.com/templates/hinsberg-test.webp) [Edit in MolDraw](https://www.moldraw.com/)Download with Pro Premium template. Preview and edit it free in MolDraw; downloading and exporting it is part of [MolDraw Pro](https://www.moldraw.com/pricing). Ethylamine attacks sulfur and displaces chloride; the N-ethylsulfonamide still has an N–H made acidic by the sulfonyl group, so it dissolves in aqueous KOH as its salt. ## Mechanism step by step Benzenesulfonyl chloride tells primary, secondary and tertiary amines apart 1. **Attack at sulfur** – The amine N attacks S; chloride leaves 2. **Deprotonation** – Hydroxide removes a proton: the sulfonamide 3. **Dissolves in alkali** – The remaining N–H is acidic (pKa ≈ 10): a soluble salt forms ## Key points - The strongly electron-withdrawing SO₂ group stabilises the negative charge on N, so the N–H is acidic. - 1° amine: sulfonamide dissolves in KOH; adding acid precipitates it again. - 2° amine: R₂N–SO₂Ph has no N–H, so it stays insoluble in KOH. - 3° amine: no N–H, no stable sulfonamide; the amine is unchanged (dissolves in acid). - p-Toluenesulfonyl chloride is often used in place of benzenesulfonyl chloride. Drawn with 106 atoms, 10 arrows, 9 shapes – every one editable in MolDraw. ## Sources - [Furniss et al., Vogel's Textbook of Practical Organic Chemistry, 5th ed., Longman 1989](https://openlibrary.org/isbn/9780582462366) Textbook ## How to use this template 1. Press **Edit in MolDraw**. The template opens on the canvas of the free MolDraw editor. 2. Change anything: move structures, edit atoms and labels, recolour highlights or delete what you do not need. 3. Add your own structures, arrows and text next to it, or combine several templates on one page. 4. Export the drawing as PNG, SVG or PDF for slides, worksheets, theses and papers. ## Frequently asked questions ### Is the Hinsberg test template free? You can preview the Hinsberg test template here and open and edit it in MolDraw for free. Downloading or exporting it is part of MolDraw Pro, together with the other premium templates. ### Can I edit the Hinsberg test template? Yes. It opens as an ordinary MolDraw drawing, so every structure, arrow, label and colour can be changed, and you can add your own content around it. ### Is the chemistry checked? Every structure is checked with RDKit and every curly arrow passes MolDraw’s electron-flow audit. The sources used are listed on this page. ### Which name reactions are included? 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